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Journal of Dairy Science Vol. 49 No. 12 1511-1514
© 1966 by American Dairy Science Association ®
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Comparison of Feeding Value of Corn and Grain Sorghum Silages on the Basis of Milk Production and Digestibility

C. B. Browning1 and J. W. Lusk

Dairy Science Department, Mississippi State University, State College

ABSTRACT

Eighteen cows were used to compare the feeding value of three silages, a combine-type (RS610), a forage-type (Regular Hegari) grain sorghum, and corn. A switchback design trial with 28-day periods and individual feeding was used. The cows were fed silage ad libitum twice daily and 0.5 kg of alfalfa hay per 100 kg of body weight once daily. A 16% crude protein grain mix was fed at the rate of 1.0 kg per 3.0 kg of 4% FCM.

The average daily silage dry matter consumption was significantly greater for RS610 than for corn or Hegari. There was no significant difference in average daily FCM production between cows fed RS610 and corn. Both supported a higher level of production than Hegari. The cows fed RS610 and those fed corn silage increased in body weight during the trial. The difference was significant in favor of the RS610-fed cows. The cows fed Hegari had a slight daily body weight loss.

A 3 x 3 Latin-square design digestion trial with six bred dairy heifers was used to determine digestibility of the three silages. The digestion coefficients for dry matter and gross energy were greater for the corn silage than for either of the sorghum silages. The crude protein of the corn and RS610 silages was more digestible than that of the Hegari.

FOOTNOTES

1 Present address, Department of Dairy Science, University of Florida, Gainesville, Florida.






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Copyright © 1966 by the American Dairy Science Association ®.